Global Patent Index - EP 1167954 A4

EP 1167954 A4 2002-09-18 - METHOD AND APPARATUS FOR DETECTING NEGATIVE ION IN WATER

Title (en)

METHOD AND APPARATUS FOR DETECTING NEGATIVE ION IN WATER

Title (de)

VEFAHREN UND VORRICHTUNG ZUM NACHWEIS NEGATIVER IONEN IN WASSER

Title (fr)

METHODE DE DETECTION D'IONS NEGATIFS DANS L'EAU ET DISPOSITIF CORRESPONDANT

Publication

EP 1167954 A4 (EN)

Application

EP 00906709 A

Priority

  • JP 0001326 W
  • JP 7900899 A

Abstract (en)

[origin: WO0057165A1] The invention provides a method and apparatus for detecting negative ions in water, which needs no replacement of ion-exchange resin and which is easy to operate and capable of low-cost measurements with accuracy. The apparatus for detecting negative ions in water comprises an electrolyzer including a cation-exchange membrane between an anode compartment with an anode plate and a cathode compartment with a cathode plate; a DC power supply unit for applying DC voltage between the anode and cathode of the electrolyzer; and an electric conductivity cell for measuring the electric conductivity of sample water. The anode compartment of the electrolyzer connects a channel for introducing sample water into the anode compartment and a discharge channel for discharging the electrolyzed water from the anode compartment, and the discharge channel is connected with the cathode compartment through the electric conductivity cell.

IPC 1-7 (main, further and additional classification)

G01N 27/10; G01M 3/18; G01N 27/06; G01N 30/00; G01N 33/18

IPC 8 full level (invention and additional information)

C25B 9/00 (2006.01); G01M 3/18 (2006.01); G01N 27/06 (2006.01); G01N 27/10 (2006.01); G01N 30/00 (2006.01); G01N 33/18 (2006.01)

CPC (invention and additional information)

G01N 27/06 (2013.01); G01N 33/182 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 0057165 A1 20000928; AU 2829300 A 20001009; DE 60029575 D1 20060907; DE 60029575 T2 20070809; EP 1167954 A1 20020102; EP 1167954 A4 20020918; EP 1167954 B1 20060726; JP 3704289 B2 20051012; US 6686751 B1 20040203

INPADOC legal status


2014-09-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20121002

2013-02-07 [REG DE R119] APPLICATION DEEMED WITHDRAWN, OR IP RIGHT LAPSED, DUE TO NON-PAYMENT OF RENEWAL FEE

- Document: DE 60029575

- Effective date: 20121002

2013-01-31 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

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2013-01-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20120402

2012-12-21 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20121130

2012-11-28 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20120306

2011-07-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Year of fee payment: 12

2011-07-29 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2011-05-31 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Year of fee payment: 12

2007-07-04 [26N] NO OPPOSITION FILED

- Effective date: 20070427

2007-02-09 [ET] FR: TRANSLATION FILED

2006-09-07 [REF] CORRESPONDS TO:

- Document: DE 60029575 P 20060907

2006-07-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

2006-07-26 [REG GB FG4D] EUROPEAN PATENT GRANTED

2006-02-22 [RTI1] TITLE (CORRECTION)

- Free text: METHOD AND APPARATUS FOR DETECTING NEGATIVE IONS IN WATER

2005-03-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050131

2004-05-19 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB

2002-09-18 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20020802

2002-09-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE FR GB

2002-09-18 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7G 01N 27/10 A, 7G 01N 33/18 B, 7G 01N 27/06 B, 7G 01M 3/18 B, 7G 01N 30/00 B

2002-01-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010924

2002-01-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB

2002-01-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-01-02 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI